Given here is the online Water Pressure Head Calculator which calculates the pressure of water from height. However wide the water container is, it does not affect the pressure. Water pressure is directly proportional to its height of storage. In the below Water Pressure calculator enter the height and click calculate to know Water Pressure in kPa (kilo pascal). It can also be measured in 'bars' - 1 bar is the force needed to raise water to a height of 10 metres.
Find the pressure of water for height of about 15 m.
Water Pressure = 15×9.81
= 147.15 kpa